Doubt can be an obstacle to meditation or a form of healthy inquiry. It is helpful to ask questions, to ponder, and be willing to doubt our beliefs and opinions. Ask yourself: are my views true? We hold many unexamined beliefs—beliefs about self, about how things should be, about what other people should do. The Kalama Sutta encourages us to question what we think, and to not adopt beliefs based on hearsay or mere tradition. We can use our minds to critically inquire into how things actually are. Doubt as an obstacle, on the other hand, is a painful state that leads to confusion, fear, indecision, and uncertainty. It manifests as obsessive thinking, planning, and anxiety. The Discourse to Malunkyaputta (Middle Length Discourses, M. 63) proposes that if we indulge in speculative thinking we might miss the opportunity to free ourselves from suffering. Specific suggestions are offered for working skillfully with the hindrance of doubt.